Bearing protection device



May 7, 1935. o. C. GRUENDER 2,000,385

v BEARING PROTECTION DEVICE Filed May 27, 1952 2 sheets-sheet 1 A.jg

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BEARING PROTECTION DEVICE Filed May 2v, 1952 2 sheets-sheet 2 f7 i; a?

' ---f Iza/enfer Oscar" C. @razen Je? 6 C, y gul-N M Patented May 7, 1935 UNITED STATES BEARING PROTECTION DEVICE ApplicatienMay 27, 1932, Serial No. 613,872

2 Claims.

My invention relates to an improvementfin bearing protecting means which is particularly applicable for use with gyratory cone Crushers. I illustrate it in connection with a gyratory cone crusher in which the crushing head is mounted on a, main spherical bearing. One object is the prevention of admission of dust or grit to'such main bearing. Another object is the prevention of the admission of dust or grit to the circulation of oil which passes outwardly from said main bearing. Another Objectis the provision of improved means for employing air to protect the bearings. Other objects will appear from time to time in the course of the specification and I illustrate my invention more or less diagrammatically in the accompanying drawings, where- Figure l is a vertical section;

Figure 2 is a section on the line 2-2 of Figure 1; and

Figure 3 is a section on the line 3-3 of Figure 2.

Like parts are indicated by like symbols throughout the specification and drawings.

Referring to the drawings, A generally indicates any suitable base upon which may be mounted the generally cylindrical main frame member A1 with its bottom flange or flanges A2.

Mounted upon the upper edge of the main frame A1 is the tilting ring B with a screwthreaded portion B1 in mesh with a correspondingly screwthreaded portion B3 of the bowl B2. B4 is any suitable liner secured to the bowl as by the lugs B5 and the bolts B5. B1 are springs compressed between the bottom of the flange B3 about the top of the main frame A1 and the abutment ring B9. B19 are tension members connecting the ring B with the abutment ring B9, whereby the springs B7 are effective to hold the ring B normally fixed in relation to the main frame A1.

C indicates a central bearing member which may be connected as bythe spider C1 to the frame A1. Rotatable within the bearing C is the eccentric sleeve C2 having at its top a gear C3 in mesh with the pinion C4 on a drive shaft C5, whereby the eccentric sleeve C2 may be rotated. C5 indicates a gear box formed unitarily with the bearing sleeve C. C7 is a cover therefor centrally apertured as at C8 in alignment with the eccentric sleeve C2. C9 is a spherical bearing member mounted upon the cover C1. C19 is an eccentric aperture within the sleeve C2.

D indicates a crusher shaft within the aperture C19. Mounted on the top of the crusher shaft is PATENT oFFlcE the crushing head D1 upon which is any suitable crushing mantle D2 which may be held suitably in position thereon as by any suitable locking sleeve D3. The head is formed with a spherical lower bearing surface D4 conforming to and opposed to the bearing member C9. The main weight of the head is borne by these opposed bearing surfaces. .l

In order to protect the main bearing thus formed I surround the periphery thereof witha maze. It may include for example the `cylindri-V cal ring E depending from thev head and fairly closely surrounding the bearing surface D4.v It penetrates within an oil sump E1 formed in the cover plate C7 and from which extend oil runoff passages E2 to carry off oil which escapes over the edge of the bearing member C9. Positioned about the cylindrical maze member E but located upon the cover plate CFl is a similar cylindrical4 member E3. Exterior to it are the interpenetrat` ing or overlapping members E'1 E5 formed on the head D1 and the cover plate CFI respectively. They approach fairly closely but do not contact.

E5 is an additional surrounding apron extend- .ing from about the outer lower edge of the head D1.

Formed in the cover plate CFI is a circumferential air chamber G which may be closed as by the surrounding plate G1 to leave an annular air discharge aperture G2, which may be gauged and kept uniform as by a plurality of webs G3 about the member E5, whereby air under pressure may be directed against the outer surface of the member E4 on the head. It will be noted that the surface of-E4 is inclined in relation to the direction of the air discharged through the aperture G2. Any suitable means may be employed for delivering air to the chamber G, as for example the air passages G5, the aperture or apertures G6 in the gear case C5, and the apertures G" in the cover plate C". The arrows in Figure .3 indicate generally the direction followed by the air, it being understood that the aperture directs a circumferential sheet of air at high speed against the -inclined outer face of the member E4. This 4 and diagrammatic rather than as limiting me to my speciiic showing. Y

The use and operation of my invention are as follows:

In order to prevent the access of dust or grit to the main bearing or to the oil, I provide a maze which makes it dicult if not impossible for particles of dust or grit to penetrate as far as the sump E1. Under some circumstances the maze itself may be sufiicient. Under other circumstances I may prefer to employ also the air delivery means above described. Thus a sheet 0f air may be delivered from the aperture G2 against the inclined outer surface of the member E4. As the air impinges against the inclined surface it will then turn and follow the surface and finally escape outwardly beneath the apron E6.

The oil cannot escape since it ows o through the passages E2 from the sump E1. The overlap of the members E and E3 is such that by no ordinary possibility can oil escape and the oil flows off through the passages'E unmixed with grit or dust.

I claim:

1. In a gyratory Crusher including a supporting frame having a bearing surface, a head supported on said bearing for gyratory movement, means for gyrating the head, and a bowl opposed to saidhead; means for preventing the penetration of foreign material into said bearing including a depending apron carried bythe head surrounding the bearing and terminating below the plane thereof in all positions of the head, an upwardly extending apron carried by the frame surrounding the bearing and terminating above the lower end of the head-carried apron in all positions of the head, said aprons beh'lg spaced from each other in all positions of the head, a circumferential air chamber carried by the frame surrounding the frame-carried apron and having an upwardly directed annular air discharge orifice providing an upwardly directed circumferential curtain of air, and a downwardly and inwardly inclined annular apron carried by the head overlying said air discharge orifice in all positions of the head for directing the circumferential curtain of air under pressure in a direction upwardly and outwardly away from said bearing.

2. In a gyratory crusher including a supporting frame having a bearing surface, a head supported on said bearing for gyratory movement, means for gyrating the head, and a bowl opposed to said head; means for preventing the penetration of foreign material into said bearing including a depending apron carried by the head surrounding the bearing and terminating below the plane thereof in all positions of the head, an upwardly extending apron carried by the frame surrounding the bearing and terminating above the lower end of the head-carried apron in all positions of the head, said aprons being spaced from each other in all positions of the head, a circumferential air chamber carried by the frame surrounding the frame-carried apron and having an upwardly directed annular air discharge orifice providing an upwardly directed circumferential curtain of air, a downwardly and inwardly inclined annular apron carried by the head overlying said air discharge orice in all positions of the head for directing the circumferential curtain of air under pressure in a direction upwardly and outwardly away from said bearing, and an outwardly and downwardly inclined circumferential apron carried by theliead, said last mentioned apron being outwardly of and concentric with the downwardly and inwardly inclined apron, and cooperating therewith vto iinally discharge the air in a downwardly directed outwardly iiaring protective curtain.

- OSCAR C. GRUENDER. 

